Doc: Update documentation for modifying postgres_fdw foreign tables.

Document that they can be modified using COPY as well.

Back-patch to v11 where commit 3d956d956 added support for COPY in
postgres_fdw.

diff --git a/doc/src/sgml/postgres-fdw.sgml b/doc/src/sgml/postgres-fdw.sgml
index c1daf1277066a4b8a2fa44aa87cacbe8404b7c8a..9d4d7ccba12163ecebeef4ef9831b2bb13ae0a76 100644 (file)
--- a/doc/src/sgml/postgres-fdw.sgml
+++ b/doc/src/sgml/postgres-fdw.sgml
@@ -64,7 +64,8 @@
   Now you need only SELECT from a foreign table to access
   the data stored in its underlying remote table.  You can also modify
   the remote table using INSERT, UPDATE,
-  DELETE, or TRUNCATE.
+  DELETE, COPY, or
+  TRUNCATE.
   (Of course, the remote user you have specified in your user mapping must
   have privileges to do these things.)